Orientation and differentiation of epidermal structures by a concentration gradient.
D000818:Animals; D007313:Insecta / Q000033:anatomy & histology / Q000254:growth & development*; D007447:Invertebrate Hormones / Q000502:physiology*; D009024:Morphogenesis; D012867:Skin / Q000254:growth & development
D007447:Invertebrate Hormones